Bonnet for motor-vehicles.



PATENTED AUG. 27. 1907 J. SHERWIN.

BONNET FOR MOTOR VEHICLES.

APPLICATION FILED MAR 3.1906.

WITNESSES:

TTOHNE) UNITED STATES PATE NT 1 F l( l E.

JOHN SHERWIN, ()F (FLEYELANI). Ulllt). ASSIHXOR TO THE ti.\ ill-URN tt ill I.\.\\'. Hi" I'ILY RH. OlllO, UOlilUltA'llOX 01 (Hill).

BONNET FOR MOTOR-VEHICLES.

Application filed March 3,

To all whom it may concern:

Be it known that 1. JOHN Snsnwtn, a citizen of the United States, and a resident of Cleveland. in the county of (uyahoga and State of Ohio, have invented certain new and useful Improvements in Insulated Bonnets, of which the following is a full. clear and exact description. whereby any one skilled in the art may make and use thesame.

The invention relates to automobiles and more })2llticularly to that part of such a structure commonly known as the bonnet or inclosing casing for the engine and various mechanical parts.

Ordinarily, the engine which develops considerable heat, is arranged within acompartment and inclosed to a greater or less extent by a metallic or other inclosing casing and, in many instances. as in the ease of a and in advance of a dash, while a radiator is carried at.

the extreme front. In suchconstructions the honnet extends from the dash to the cooling device.

The objects of theinvention are to provide a "bonnet of the character described which will be completely insulated against the direct transmittal of heat or cold.

A further object of the invention is to provide a bonnet of the character described so interlined with insulating material as to preclude the possibility of overheating of the metallic bonnet and the consequent liability of.its dressing or varnish becoming blistcred or discolored.

Referring to the drawings :--Figure 1 is a-somewhat diagramic view of the forward end of a vehicle. Fig. 2 is a cross-sectional view through the bonnet.

While it has been common practice in the various arts to insulate compartments carrying heated apparatus and to provide insulation to prevent fire, the bonnet or covers which inclose engines of automobiles, have not been insulated and have been formed usually from sheet metal arranged in sections adapted to be turned back to expose the working parts of. the engine or driving mechanism. In the common practice now employed such a sheet metal bonnet usually forms an inclosing casing at the forward end of the vehicle and overlies the engine cylinders and radiators provided for cooling the fluid which is usually employed to reduce the heat of the engine induced by the tire of the highly explosive gaseous mixtures. In ordinary practice such a metallic bonnet extends from the dash to orover the radiating coil at the forward end of the vehicle; and it is a general practice to employ a forced circulation of air through the coil and compartment for Patented Aug. 27, 1907.

1906- Berial N0- 303,999-

' dissipating such heat as radiates from thcjacket ed cylinders. It is not uncommon for this radiated heat 3 to reach such temperatures as will blister the finish applied to the outer surface of the bonnet and, in almost every case, the heat is sullicient to cause deterioi ration of the finish to such an extent as to change its color and destroy the usual artistic beau! ies of the finish of the vehicle. In addition to this, great ditliculty is experienced in the use of gasolene vehicles by freezing of the fluid which is circulated to cool the motors when the machine is standing during extreme weather. By i using the insulating material Within the bonnet, heat is maintained for a much longer period of time, 3 and the liability of freezing is materially reduced. In t the same manner the insulating material applied to the "bonnet prevents overheating of the engine when running and subjected to high temperatures of the sun i in summer or in tropical climates.

In carrying out the invention there is applied to the V entire inner surface of the bonnet a a lining of insulating material b. This materialis firmly cemented-to the metallic bonnet and covers every portion of it. The preferred method of applying insulation is to coment it in woven or fabric form to the surface; or, obviously, it may be applied by riveting or any other approved method of securing one material to another. The bonnet as a, as shown herein, is of the usual frame c between the dash (I and the radiator e. This boiinet covers the engine j which as indicated, is of the liquid hydrocarbon type.

Hinges g, h and i are provided, which extend the entire length of the bonnet and permit raising it from either or both sides to permit access to the compartment within which the engine is mounted.

Of course, it is understotxl that the chassis frame, a portion of which is shown, extends rearwardly and is spring supported over a rear axle as well as over the axle i indicated as the forward axle; and said chassis supports the various parts of the driving mechanism of the vehicle as well as the body.

The form of bonnet herein illustrated, is provided with louvers k, providing air passages to ventilate the motor compartment.

It will be seen from the above description that there are material advantages resulting from the use of a completely interlined bonnet. First, the temperatures resulting from the use of the engine under normal conditions, may be maintained and the ventilating and heat dissipating practice, including the fan-blower and circulated water, will be fully effective under the given designs. Second, temperatures to prevent freezing will be maintained within the compartment under atmospheric conditions of low temperatures for a conhinge fprm mounted upon the forward end of the chassis I. As 1111 article of mnnufnct'ul'P, a bonnet fur mm) llltllllll'S ('UllSlSllllfJ of a metallic casing having an insulated 

